If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Obvious to regular users != obvious to new user
Monkeymind knew why he was being downvoted.
Edit: But, I agree with your point that many community norms that will get one downvoted are not accessible to new members.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.